Cellular impact of metal trace elements in terricolous lichen Diploschistes Muscorum (SCOP.) R. Sant.: Identification of oxidative stress biomarkers

The purpose of this research is to present toxic effects of some heavy metals (cadmium, lead and zinc) on lichen physiology. In the North of France, those metals are concentrated for example in industrial polluted soils near metallurgic plants and waste dumps. Our investigations were conducted on Di...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2004-02, Vol.152 (1-4), p.55-69
Main Authors: CUNY, Damien, VAN HALUWYN, Chantal, SHIRALI, Pirouz, ZERIMECH, Fharid, JEROME, Laurence, HAGUENOER, Jean Marie
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Cadmium
Diploschistes
Diploschistes muscorum
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on plants and fungi
Environmental assessment
Environmental monitoring
Fundamental and applied biological sciences. Psychology
Glutathione
Heavy metals
Industrial pollution
Landfills
Lichens
Metabolites
Metals
Oxidative stress
Physiology
Secondary metabolites
Soil pollution
Superoxide dismutase
Trace elements
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Summary:The purpose of this research is to present toxic effects of some heavy metals (cadmium, lead and zinc) on lichen physiology. In the North of France, those metals are concentrated for example in industrial polluted soils near metallurgic plants and waste dumps. Our investigations were conducted on Diploschistes muscorum (Scop.) R. Sant, a terricolous lichen growing on previously quoted soils as well as on non-contaminated ones. Different stress parameters were investigated as potassium leakage - which is related to the loss of membrane integrity - and oxidative stress through following parameters: malondialdehyde (MDA), glutathione (GSH) and superoxide dismutase (SOD). It seems, therefore, that heavy metals induce oxidative stress in this lichen, in which we found membrane damage and enhancement of SOD activity and GSH concentrations. With regard to very high concentrations of Cd, Pb and Zn, a resistance involving antioxidant mechanisms limits the expected damage. Those mechanisms involve GSH, SOD as well as secondary metabolites, which have this resistance property. This study is a first step of investigation to use - in the future- physiological parameters as tool for environment assessment.[PUBLICATION ABSTRACT]
ISSN:0049-6979
1573-2932
DOI:10.1023/B:WATE.0000015332.94219.ff